Karma yoga is selfless service, the path by which the mind is most quickly purified and its limits transcended. The karma yogi works hard, both physically and mentally. He seeks to eliminate the ego and its attachments, to serve humanity without expecting rewards, and to see unity in diversity . This enables him to tune to the one underlying divine essence that dwells within all beings. Karma yoga is most suitable for people who have an active temperament. It involves working in the world and giving of oneself, but working on a spiritual level.